Home Postcode finder WA Lakewood Lakewood postcode WA Lakewood is a locality in Western Australia covered by postcode 6431. Postcode 6431 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Lakewood business listing Be the first listing in Lakewood Common questionsWhat is the postcode for Lakewood?Lakewood, WA has the postcode 6431.What state is Lakewood in?Lakewood is in Western Australia (WA).Does postcode 6431 cover more than one suburb?Yes. Postcode 6431 covers 13 localities, so the postcode alone does not identify Lakewood. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.